package JDBC_learn;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
//connection
public class JDBCDemo2 {
    public static void main(String[] args) throws Exception {
        //1.注册驱动
      //  Class.forName("com.mysql.jdbc.Driver");
        //2.获取链接
       // String url="jdbc:mysql://127.0.0.1:3306/itheima";
        //如果连接的是本机的myaql并且端口号是默认的3306可以简化书写
        String url="jdbc:mysql:///itheima?useSSL=false";
        String username="root";
        String password="11235813";
        Connection conn = DriverManager.getConnection(url, username, password);
        //3.定义sql
        String sql1="update account set money=5000 where id=1";
        String sql2="update account set money=3000 where id=2";
        //4.获取执行sql的对象Statement
        Statement stmt = conn.createStatement();


        try {
            //开启事务
            conn.setAutoCommit(false);
            //5.执行sql
            int count1=stmt.executeUpdate(sql1);//受影响的行数
            //6.处理结果
            System.out.println(count1);
            int count2=stmt.executeUpdate(sql2);
            System.out.println(count2);
            //提交事务
            conn.commit();

        } catch (Exception e) {
            //回滚事务
            conn.rollback();
            throw new RuntimeException(e);
        }

        //7.释放资源
        stmt.close();
        conn.close();

    }
}
